Question

What do the magnetic field patterns indicate about the forces if interaction between magnets

Answer 1

It locks the pattern perfectly so the work would be efficient

The lines between like poles bend away from each other then goes back towards the other end to form close loops inside out, never meeting. On the other hand, the lines between unlike poles flow out from one end and enter the other end.

Furthermore, the region between two unlike poles have concentrated lines showing the forces of attraction between.